Bastion is a multipurpose, all-in-one, Discord Bot that has features like Administration, Moderation, Searches, Game Server Stats, Player Stats, Music, Games, User Profiles, User Levels, Virtual Currencies, Humor, and it even talks with you. https://bastionbot.org
You can start translating whenever you want. And don't send any message to any owners/managers requesting for proofreader permission, you won't get that if you do. Just translate and you'll be promoted to a proofreader if you have done enough quality translations for the project.
If you want to contribute to a language that's not in the list, feel free to contact me in Discord.
Join Bastion: Discord Server https://discord.gg/fzx8fkt and let me (@k3rn31p4nic#8383) know about your contribution to get a special Translators role.